Benjamin f



(No ModelL) B. F. ORTON.

ARMATURB FOR DYNAMO ELECTRIC MACHINES.

No. 308,851. Patented Dec. 2, 1884.

N, PETERS. Phnm-Lflhagraphur. WJshmPJun. D. c.

UNITED STATES PATENT OFFICE.

BENJAMIN F. OR'ION, OF NEW YORK, N. Y.

ARMATURE FOR DYNAMO-ELECTRlC MACHINES.

EJPECIFICATION forming part of Letters Patent No. 308,851, dated December 2, 1884.

Application filed January 25, 1884.

To aZZ whom, it may concern.-

Be it known that I, BENJAMIN F. Onron, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Armatures l'or Dynamo Electric Machines or Motors, of which the following is a specification.

My invention relates to the construction of so-called sectional armatures, in which the armature core or carrier is built up from two or more curved segments, each forming or embracing a portion only of the circumference of the armature.

The object of my invention is, first, to provide a simple and effective means for securingadjoining segments or sections together; second, to so construct the armature that the armature-coils may be wound separately in a lathe or otherwise upon a suitable bobbin or holder, and may then be slipped endwise into place upon the armature-segments and held in place by any suitable means. By such a construction I greatly facilitate the making of sectional armatures, and at the same time secure the important result that any armature coil or bobbin may be readily removed at any time, in case it becomes damaged, and its place tilled by a new and perfect coil and bobbin. Moreover, there is no difiiculty encountered in making the armature-core of two pieces only, each making a half of the circumference of the armature, since in my invention the armaturescgments do not require to be placed in a lathe for the purpose of wind ing the armaturecoils upon them; but said coils are wound upon their bobbins separately and then slipped into place upon the armature section or segment.

To the above ends my invention consists in certain improvements in the construction and in the combinations of parts, the nature of which will be readilyunderstood from the accompanying description and drawings, and which will be specified in the claims.

Figure 1 shows, in elevation and partially in section, a portion of an armature constructed according to my invention. Fig. 2 is aseetion, at right angles to the armature-axis, of an armature having an improved device for fastening the armature segments or sections to- {No model.)

gether. Fig. 3 is a cross-section on the line 6 6 of Fig. 1. Fig. 4 is a plan of a portion of an armaturescgment spread upon the plane of the paper, and showing in plan three armature-coils in place upon the segment, as also modifications of the keying or locking device interposed between the armature-bobbins for holding them in place. Fig. 5 is a cross-sec tion on the line 5 5 of Fig. 1.

In the drawings I have shown my present invention as appliedto an armature whose core is built up and supported in the general way described and claimed in another application for patent filed by me December 11, 1883, No. 114,161. In such application I propose to build the armattire-segments up from superimposed cnrved plates separated by washers or plates of iron, and resting at their abut-ting ends upon tables or plates formed upon the endsot' armature-spokes or radial arms, and secured by stirrnps or saddles embracing the abutting ends and extending across "from one side of the armature to the other. I do not, however, wish to be understood as limiting myself to this special construction of or method of supporting and securing the individual segments, and have showirthis form only for the purpose of illustration of the for turcs to which my present invention relates.

In Fig. 1, (t a a, &c., indicate thin curved plates of iron, each extending through hall' the circumference of the armature, that are secured together and to plates A by bolts or rivets Z) Z), or other devices, and are separated by washers or blocks 0 c of iron or other material. 'Ihe armaturesegments thus formed rest upon the plates or tables (I (1, formed upon the ends oi the spokes c c, and are held in place by the saddles f f, bolted to the sides of the plates d d, and extending across from one side of the arn'iature to the other in a direction parallel to the axis of the machine.

A indicates a tray-like under plate, forming a portion of the core, and upon which the other plates, a a, rest.

The parts so far as described are in substance the same as in my prior case; but the sections or segments differ from these described in my prior case, as well as from those 01' other armatnrcs, in that each segment is free from lateral lugs or projections for hold ing the armature bobbins in place, and is made of proper size to permit the bobbins,

after being wound, to be slipped into place over the end of the segment. The general contour of the segment is shown in Figs. 3 and l, and its largest portion is at m m,where each bobbin rests. At this portion it is supposed to fill the interior space of the bobbin, so that the latter, after being slipped into position, will be held firmly.

Between the portions m m are the slots or notches a a, formed in each plate a a. A, and adapted to form keyways or guides for bolding blocks or keys of a suitable form tofill the slots and interposed between the bobbins for the purpose of locking them together and firmly in place. The keys are slipped into place sidewise or from the exterior of the armature, and are held in place by any suitable devicesuch, for instance, as that hereinafter described. The keys are preferably of iron, and these serve also to bring the magnetism of the core into the space between the bobbins and close to the pole-pieees of the field magnet.

The bobbins or holders for the armaturecoils are indicated at h h, and are of any suitable or desirable construction for receiving and holding the armature-coils 7a 7.7, which are wound upon the bobbins in any suitable manner previous to the placing of the same upon the armature.

In Fig. 1 live bobbins are shown in place four filled with coils and the other empty.

The keys may be solid or made up, like the armature-segments, from a series of plates or strips '15 t, bolted or secured together by rivets or bolts 2), Figs. i and 5. I prefer to make such keys of iron or of iron plates, and to separate them by washers or blocks 0', Fig. 5. This construction both breaks up the circulation of Foucault or induced currents and likewise helps to keep the armature cool.

fill the space between the bobbins on the side only of the armature, as indicated in top view at II II, Fig. 4; or they may be so made as to also fill the space between the bobbins on the exterior of the armature, as indicated at L L, Fig. i, and in cross-section in Fig. 5, where the additional portion filling such space is shown made up of thin plates separated by washers and secured together and to the plates filling the side spaces by a bolt. lVith such eonstruetion it is obvious that the key must be slipped into position from the outer side of the armature. The keys are held in position against centrifugal action by cap-plates s, of any desired form, which bridge the two arms of a stirrup, i opening upward and extending across on the inner side of the armature. The plates 8 are secured to the stirrups by nuts 8" upon screwthreaded studs at the ends of the stirrup-arms, as shown.

Instead of making the keys in the form "before described, they may be made in other The keys may be constructed separately and formsas, for instance, in the form shown at B", Fig. 4, where the base of the key, or that portion next the armature-core, has transverse teeth or webs extending outward at right angles from the core to a point ilush with or nearly flush with the outer surface of the coils.

To prevent endwise movement of the seg ments in their bearings or tables (7, I cut the plates a A with an offset or rabbet, (indicated at w, Fig. 4-,) which rests against the edges of the supports (1 and the saddles f.

A preferred device for securing the ends of the core-segments together is shown in Fig. 2. It consists of the l. or angle pieces I-I Ilflhaving their radial portion secured together by a bolt or bolts, hi, while their cireui'nfercntial portions are bolted, respectively, to the abutting ends or the armature-segments or are otherwise secured to them. The L-picces are preferably of iron, and by abutting closely against one another help to maintain the mag .netic continuity of the core.

In applying and securing the armature-bobbins in place, they are, after being wound, slipped separately over the end of the armature-segment.

After putting a bobbin in place, keys are applied and secured next to it by the stirrups t and plates 3, and otherbobbins and keys are then placed alternately upon the armaturesegmcut in obvious manner. If at any time it be desirable to remove a bobbin, it is easy to do so by removing the keys and slipping the bobbins oit from the end of the segment until the defective bobbin is reached.

I do not limit myself as to the construction of the armature-core, nor toany particular device for holding the keys in place.

Other modifications coming under the invention claimed will readily occur to those skilled in the art.

lVhat I claim as my invention is- 1. The combination, with an armature-core made up of coresections free from projections and of proper size to permit the armaturebobbins to be slipped into place endwisc upon it, of a carrier or supporting i'rame, upon which abutting ends of the core-sections rest, and clamping devices whereby the core-sections may be held together at their abutting ends, where they rest on the frame.

2. The co1nbination,with the armaturcscgment having notches or recesses at its sides, of the key-pieces in said notches and between the armature-bobbins, as and "for the purpose described.

3. The combination,with the armature-bobbins, of the interposed attached key-pieces made up of superposed metal plates, as and for the purpose described. 41-. The combination, with the armature-segments having slots or recesses in their sides, of the keypieces, as and for the purpose described.

5. An armature segment or section made up oi superimposed plates curved to the form of IOC IIO

the armature-ring or cylinder, and having its bobbins, of the removable keys and the notches or recesses in their edges, in combistirrnps and cross-plates for holding the keys nation with key-pieces fitting said notches, as in place. and for the purpose described. Signed at New York, in the county of New 5 6. The combination, with two segments or York and State of New York, this 21st day of I 5 sections in a sectional armature, of two L- January, A. D. 1884.

pieces bolted to one another and individually BEN J AMIN F. ORTON. bolted to the abutting ends of the segments, XVitnesses: as and for the purpose described. THos. TOOMEY,

IO 7. The combination, with the armature and GEO. G. COFFIN. 

